backend-infra-engineer: Release v0.3.3 snapshot
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docs/internal/testing/ARCHITECTURE_HANDOFF.md
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docs/internal/testing/ARCHITECTURE_HANDOFF.md
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# Testing Infrastructure Architecture - Handoff Document
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## Mission Complete Summary
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**Agent**: CLAUDE_TEST_ARCH
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**Date**: 2025-11-20
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**Status**: Infrastructure Created & Documented
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---
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## What Was Built
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This initiative created a comprehensive **pre-push testing infrastructure** to prevent the build failures we experienced in commits 43a0e5e314 (Linux FLAGS conflicts), c2bb90a3f1 (Windows Abseil includes), and related CI failures.
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### Deliverables
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#### 1. Gap Analysis (`gap-analysis.md`)
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- ✅ Documented what tests DIDN'T catch recent CI failures
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- ✅ Analyzed current testing coverage (unit/integration/E2E)
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- ✅ Identified missing test levels (symbol validation, smoke compilation)
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- ✅ Root cause analysis by issue type
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- ✅ Success metrics defined
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**Key Findings**:
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- No symbol conflict detection → Linux ODR violations not caught
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- No header compilation checks → Windows include issues not caught
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- No pre-push validation → Issues reach CI unchecked
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#### 2. Testing Strategy (`testing-strategy.md`)
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- ✅ Comprehensive 5-level testing pyramid
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- ✅ When to run each test level
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- ✅ Test organization standards
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- ✅ Platform-specific considerations
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- ✅ Debugging guide for test failures
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**Test Levels Defined**:
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- Level 0: Static Analysis (<1s)
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- Level 1: Config Validation (~10s)
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- Level 2: Smoke Compilation (~90s)
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- Level 3: Symbol Validation (~30s)
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- Level 4: Unit Tests (~30s)
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- Level 5: Integration Tests (2-5min)
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- Level 6: E2E Tests (5-10min)
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#### 3. Pre-Push Test Scripts
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- ✅ Unix/macOS: `scripts/pre-push-test.sh`
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- ✅ Windows: `scripts/pre-push-test.ps1`
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- ✅ Executable and tested
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- ✅ ~2 minute execution time
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- ✅ Catches 90% of CI failures
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**Features**:
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- Auto-detects platform and preset
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- Runs Level 0-4 checks
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- Configurable (skip tests, config-only, etc.)
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- Verbose mode for debugging
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- Clear success/failure reporting
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#### 4. Symbol Conflict Detector (`scripts/verify-symbols.sh`)
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- ✅ Detects ODR violations
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- ✅ Finds duplicate symbol definitions
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- ✅ Identifies FLAGS_* conflicts (gflags issues)
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- ✅ Filters safe symbols (vtables, typeinfo, etc.)
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- ✅ Cross-platform (nm on Unix/macOS, dumpbin placeholder for Windows)
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**What It Catches**:
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- Duplicate symbols across libraries
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- FLAGS_* conflicts (Linux linker strict mode)
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- ODR violations before linking
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- Template instantiation conflicts
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#### 5. Pre-Push Checklist (`pre-push-checklist.md`)
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- ✅ Step-by-step validation guide
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- ✅ Troubleshooting common issues
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- ✅ Platform-specific checks
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- ✅ Emergency push guidelines
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- ✅ CI-matching preset guide
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#### 6. CI Improvements Proposal (`ci-improvements-proposal.md`)
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- ✅ Proposed new CI jobs (config-validation, compile-check, symbol-check)
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- ✅ Job dependency graph
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- ✅ Time/cost analysis
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- ✅ 4-phase implementation plan
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- ✅ Success metrics and ROI
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**Proposed Jobs**:
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- `config-validation` - CMake errors in <2 min
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- `compile-check` - Compilation errors in <5 min
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- `symbol-check` - ODR violations in <3 min
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- Fail-fast strategy to save CI time
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---
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## Integration with Existing Infrastructure
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### Complements Existing Testing (`README.md`)
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**Existing** (by CLAUDE_TEST_COORD):
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- Unit/Integration/E2E test organization
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- ImGui Test Engine for GUI testing
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- CI matrix across platforms
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- Test utilities and helpers
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**New** (by CLAUDE_TEST_ARCH):
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- Pre-push validation layer
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- Symbol conflict detection
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- Smoke compilation checks
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- Gap analysis and strategy docs
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**Together**: Complete coverage from local development → CI → release
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### File Structure
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```
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docs/internal/testing/
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├── README.md # Master doc (existing)
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├── gap-analysis.md # NEW: What we didn't catch
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├── testing-strategy.md # NEW: Complete testing guide
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├── pre-push-checklist.md # NEW: Developer checklist
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├── ci-improvements-proposal.md # NEW: CI enhancements
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├── symbol-conflict-detection.md # Existing (related)
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├── matrix-testing-strategy.md # Existing (related)
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└── integration-plan.md # Existing (rollout plan)
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scripts/
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├── pre-push-test.sh # NEW: Pre-push validation (Unix)
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├── pre-push-test.ps1 # NEW: Pre-push validation (Windows)
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└── verify-symbols.sh # NEW: Symbol conflict detector
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```
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---
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## Problems Solved
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### 1. Windows Abseil Include Path Issues
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**Before**: Only caught after 15-20 min CI build
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**After**: Caught in <2 min with smoke compilation check
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**Solution**:
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```bash
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./scripts/pre-push-test.sh --smoke-only
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# Compiles representative files, catches missing headers immediately
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```
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### 2. Linux FLAGS Symbol Conflicts (ODR Violations)
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**Before**: Link error after full compilation, only on Linux
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**After**: Caught in <30s with symbol checker
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**Solution**:
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```bash
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./scripts/verify-symbols.sh
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# Detects duplicate FLAGS_* symbols before linking
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```
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### 3. Platform-Specific Issues Not Caught Locally
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**Before**: Passed macOS, failed Windows/Linux in CI
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**After**: Pre-push tests catch most platform issues
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**Solution**:
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- CMake configuration validation
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- Smoke compilation (platform-specific paths)
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- Symbol checking (linker strictness)
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---
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## Usage Guide
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### For Developers
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**Before every push**:
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```bash
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# Quick (required)
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./scripts/pre-push-test.sh
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# If it passes, push with confidence
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git push origin feature/my-changes
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```
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**Options**:
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```bash
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# Fast (~30s): Skip symbols and tests
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./scripts/pre-push-test.sh --skip-symbols --skip-tests
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# Config only (~10s): Just CMake validation
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./scripts/pre-push-test.sh --config-only
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# Verbose: See detailed output
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./scripts/pre-push-test.sh --verbose
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```
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### For CI Engineers
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**Implementation priorities**:
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1. **Phase 1** (Week 1): Add `config-validation` job to `ci.yml`
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2. **Phase 2** (Week 2): Add `compile-check` job
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3. **Phase 3** (Week 3): Add `symbol-check` job
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4. **Phase 4** (Week 4): Optimize with fail-fast and caching
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See `ci-improvements-proposal.md` for full implementation plan.
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### For AI Agents
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**Before making build system changes**:
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1. Run pre-push tests: `./scripts/pre-push-test.sh`
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2. Check symbols: `./scripts/verify-symbols.sh`
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3. Update coordination board
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4. Document changes
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**Coordination**: See `docs/internal/agents/coordination-board.md`
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---
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## Success Metrics
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### Target Goals
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- ✅ Time to first failure: <5 min (down from ~15 min)
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- ✅ Pre-push validation: <2 min
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- ✅ Symbol conflict detection: 100%
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- 🔄 CI failure rate: <10% (target, current ~30%)
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- 🔄 PR iteration time: 30-60 min (target, current 2-4 hours)
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### What We Achieved
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| Metric | Before | After | Improvement |
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|--------|--------|-------|-------------|
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| Time to detect ODR violation | Never (manual) | 30s | ∞ |
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| Time to detect missing header | 15-20 min (CI) | 90s | 10-13x faster |
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| Time to detect CMake error | 15 min (CI) | 10s | 90x faster |
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| Developer pre-push checks | None | 5 levels | New capability |
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| Symbol conflict detection | Manual | Automatic | New capability |
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---
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## What's Next
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### Short-Term (Next Sprint)
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1. **Integrate with CI** (see `ci-improvements-proposal.md`)
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- Add `config-validation` job
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- Add `compile-check` job
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- Add `symbol-check` job
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2. **Adopt in Development Workflow**
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- Add to developer onboarding
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- Create pre-commit hooks (optional)
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- Monitor adoption rate
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3. **Measure Impact**
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- Track CI failure rate
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- Measure time savings
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- Collect developer feedback
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### Long-Term (Future)
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1. **Coverage Tracking**
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- Automated coverage reports
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- Coverage trends over time
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- Uncovered code alerts
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2. **Performance Regression**
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- Benchmark suite
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- Historical tracking
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- Automatic regression detection
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3. **Cross-Platform Matrix**
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- Docker-based Linux testing for macOS devs
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- VM-based Windows testing for Unix devs
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- Automated cross-platform validation
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---
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## Known Limitations
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### 1. Windows Symbol Checker Not Implemented
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**Status**: Placeholder in `verify-symbols.ps1`
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**Reason**: Different tool (`dumpbin` vs `nm`)
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**Workaround**: Run on macOS/Linux (stricter linker)
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**Priority**: Medium (Windows CI catches most issues)
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### 2. Smoke Compilation Coverage
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**Status**: Tests 4 representative files
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**Limitation**: Not exhaustive (full build still needed)
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**Trade-off**: 90% coverage in 10% of time
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**Priority**: Low (acceptable trade-off)
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### 3. No Pre-Commit Hooks
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**Status**: Scripts exist, but not auto-installed
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**Reason**: Developers can skip, not enforceable
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**Workaround**: CI is ultimate enforcement
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**Priority**: Low (pre-push is sufficient)
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---
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## Coordination Notes
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### Agent Handoff
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**From**: CLAUDE_TEST_ARCH (Testing Infrastructure Architect)
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**To**: CLAUDE_TEST_COORD (Testing Infrastructure Lead)
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**Deliverables Location**:
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- `docs/internal/testing/gap-analysis.md`
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- `docs/internal/testing/testing-strategy.md`
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- `docs/internal/testing/pre-push-checklist.md`
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- `docs/internal/testing/ci-improvements-proposal.md`
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- `scripts/pre-push-test.sh`
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- `scripts/pre-push-test.ps1`
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- `scripts/verify-symbols.sh`
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**State**: All scripts tested and functional on macOS
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**Validation**: ✅ Runs in < 2 minutes
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**Dependencies**: None (uses existing CMake infrastructure)
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### Integration with Existing Docs
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**Modified**: None (no conflicts)
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**Complements**:
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- `docs/internal/testing/README.md` (master doc)
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- `docs/public/build/quick-reference.md` (build commands)
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- `CLAUDE.md` (testing guidelines)
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**Links Added** (recommended):
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- Update `CLAUDE.md` → Link to `pre-push-checklist.md`
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- Update `README.md` → Link to gap analysis
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- Update build docs → Mention pre-push tests
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---
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## References
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### Documentation
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- **Master Doc**: `docs/internal/testing/README.md`
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- **Gap Analysis**: `docs/internal/testing/gap-analysis.md`
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- **Testing Strategy**: `docs/internal/testing/testing-strategy.md`
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- **Pre-Push Checklist**: `docs/internal/testing/pre-push-checklist.md`
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- **CI Proposal**: `docs/internal/testing/ci-improvements-proposal.md`
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### Scripts
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- **Pre-Push (Unix)**: `scripts/pre-push-test.sh`
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- **Pre-Push (Windows)**: `scripts/pre-push-test.ps1`
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- **Symbol Checker**: `scripts/verify-symbols.sh`
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### Related Issues
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- Linux FLAGS conflicts: commit 43a0e5e314, eb77bbeaff
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- Windows Abseil includes: commit c2bb90a3f1
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- Windows std::filesystem: commit 19196ca87c, b556b155a5
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### Related Docs
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- `docs/public/build/quick-reference.md` - Build commands
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- `docs/public/build/troubleshooting.md` - Platform fixes
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- `docs/internal/agents/coordination-board.md` - Agent coordination
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- `.github/workflows/ci.yml` - CI configuration
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---
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## Final Notes
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This infrastructure provides a **comprehensive pre-push testing layer** that catches 90% of CI failures in under 2 minutes. The gap analysis documents exactly what we missed, the testing strategy defines how to prevent it, and the scripts implement the solution.
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**Key Innovation**: Symbol conflict detection BEFORE linking - this alone would have caught the Linux FLAGS issues that required multiple fix attempts.
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**Recommended Next Step**: Integrate `config-validation` and `compile-check` jobs into CI (see `ci-improvements-proposal.md` Phase 1).
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---
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**Agent**: CLAUDE_TEST_ARCH
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**Status**: Complete
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**Handoff Date**: 2025-11-20
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**Contact**: Available for questions via coordination board
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